import { Mutation, Action } from 'vuex'
// import { RouteLocationNormalizedLoaded } from 'vue-router'

export interface Tag {
  fullPath: string;
  path: string;
  name: string;
  meta: any;
}
export interface StateType {
  visitedViews: Array<Tag>;
  cachedViews: Array<string>;
}

export interface ModuleType {
  namespaced: boolean;
  state: StateType;
  mutations: {
    ADD_VISITED_VIEW: Mutation<StateType>;
    ADD_CACHED_VIEW: Mutation<StateType>;
    DEL_VISITED_VIEW: Mutation<StateType>;
    DEL_CACHED_VIEW: Mutation<StateType>;
    DEL_OTHERS_VISITED_VIEWS: Mutation<StateType>;
    DEL_OTHERS_CACHED_VIEWS: Mutation<StateType>;
    DEL_ALL_VISITED_VIEWS: Mutation<StateType>;
    DEL_ALL_CACHED_VIEWS: Mutation<StateType>;
    UPDATE_VISITED_VIEW: Mutation<StateType>;
  };
  actions: {
    addView: Action<StateType, StateType>;
    addVisitedView: Action<StateType, StateType>;
    addCachedView: Action<StateType, StateType>;
    delView: Action<StateType, StateType>;
    delVisitedView: Action<StateType, StateType>;
    delCachedView: Action<StateType, StateType>;
    delOthersViews: Action<StateType, StateType>;
    delOthersVisitedViews: Action<StateType, StateType>;
    delOthersCachedViews: Action<StateType, StateType>;
    delAllViews: Action<StateType, StateType>;
    delAllVisitedViews: Action<StateType, StateType>;
    delAllCachedViews: Action<StateType, StateType>;
    updateVisitedView: Action<StateType, StateType>;
  };
}

const storeModel: ModuleType = {
  namespaced: true,
  state: {
    visitedViews: [],
    cachedViews: []
  },
  mutations: {
    ADD_VISITED_VIEW: (state, view) => {
      if (state.visitedViews.some((v) => v.path === view.path)) return
      state.visitedViews.push(
        Object.assign({}, view, {
          title: view.meta.title || 'no-name'
        })
      )
    },
    ADD_CACHED_VIEW: (state, view) => {
      if (state.cachedViews.includes(view.name)) return
      if (!view.meta.noCache) {
        const list = JSON.parse(JSON.stringify(state.cachedViews))
        list.push(view.name)
        state.cachedViews = list
      }
    },
    DEL_VISITED_VIEW: (state, view) => {
      for (const [i, v] of state.visitedViews.entries()) {
        if (v.path === view.path) {
          state.visitedViews.splice(i, 1)
          break
        }
      }
    },
    DEL_CACHED_VIEW: (state, view) => {
      const index = state.cachedViews.indexOf(view.name)
      const list = JSON.parse(JSON.stringify(state.cachedViews))
      index > -1 && list.splice(index, 1)
      state.cachedViews = list
    },
    DEL_OTHERS_VISITED_VIEWS: (state, view) => {
      state.visitedViews = state.visitedViews.filter((v) => {
        return v.meta?.affix || v.path === view.path
      })
    },
    DEL_OTHERS_CACHED_VIEWS: (state, view) => {
      const index = state.cachedViews.indexOf(view.name)
      if (index > -1) {
        let list = JSON.parse(JSON.stringify(state.cachedViews))
        list = list.slice(index, index + 1)
        state.cachedViews = list
      } else {
        // if index = -1, there is no cached tags
        state.cachedViews = []
      }
    },
    DEL_ALL_VISITED_VIEWS: (state) => {
      // keep affix tags
      const affixTags = state.visitedViews.filter((tag) => tag.meta?.affix)
      state.visitedViews = affixTags
    },
    DEL_ALL_CACHED_VIEWS: (state) => {
      state.cachedViews = []
    },
    UPDATE_VISITED_VIEW: (state, view) => {
      for (let v of state.visitedViews) {
        if (v.path === view.path) {
          v = Object.assign(v, view)
          break
        }
      }
    }
  },
  actions: {
    addView({ dispatch }, view) {
      dispatch('addVisitedView', view)
      dispatch('addCachedView', view)
    },
    addVisitedView({ commit }, view) {
      commit('ADD_VISITED_VIEW', view)
    },
    addCachedView({ commit }, view) {
      commit('ADD_CACHED_VIEW', view)
    },
    delView({ dispatch, state }, view) {
      return new Promise(resolve => {
        dispatch('delVisitedView', view)
        dispatch('delCachedView', view)
        resolve({
          visitedViews: [...state.visitedViews],
          cachedViews: [...state.cachedViews]
        })
      })
    },
    delVisitedView({ commit, state }, view) {
      return new Promise(resolve => {
        commit('DEL_VISITED_VIEW', view)
        resolve([...state.visitedViews])
      })
    },
    delCachedView({ commit, state }, view) {
      return new Promise(resolve => {
        commit('DEL_CACHED_VIEW', view)
        resolve([...state.cachedViews])
      })
    },
    delOthersViews({ dispatch, state }, view) {
      return new Promise(resolve => {
        dispatch('delOthersVisitedViews', view)
        dispatch('delOthersCachedViews', view)
        resolve({
          visitedViews: [...state.visitedViews],
          cachedViews: [...state.cachedViews]
        })
      })
    },
    delOthersVisitedViews({ commit, state }, view) {
      return new Promise(resolve => {
        commit('DEL_OTHERS_VISITED_VIEWS', view)
        resolve([...state.visitedViews])
      })
    },
    delOthersCachedViews({ commit, state }, view) {
      return new Promise(resolve => {
        commit('DEL_OTHERS_CACHED_VIEWS', view)
        resolve([...state.cachedViews])
      })
    },
    delAllViews({ dispatch, state }, view) {
      return new Promise(resolve => {
        dispatch('delAllVisitedViews', view)
        dispatch('delAllCachedViews', view)
        resolve({
          visitedViews: [...state.visitedViews],
          cachedViews: [...state.cachedViews]
        })
      })
    },
    delAllVisitedViews({ commit, state }) {
      return new Promise(resolve => {
        commit('DEL_ALL_VISITED_VIEWS')
        resolve([...state.visitedViews])
      })
    },
    delAllCachedViews({ commit, state }) {
      return new Promise(resolve => {
        commit('DEL_ALL_CACHED_VIEWS')
        resolve([...state.cachedViews])
      })
    },
    updateVisitedView({ commit }, view) {
      commit('UPDATE_VISITED_VIEW', view)
    }
  }
}
export default storeModel
